Song Jong-ho

as Kim In-woo (16 episodes)

as Ryu Jin (16 episodes)

as Jin Ji Ham [Jung Sang's senior] (40 episodes)

as Kang Dae-seong (20 episodes)

as Jo Hwan Seung (68 episodes)

as Self (1 episode)

as Park Hwi-Kyung (102 episodes)

as Self (1 episode)

as Han Yoon-jae (12 episodes)

as Cheon Baek-gyeong (16 episodes)

as Jang Do Hyung / Seo Ji Hoon (20 episodes)

as Lee Jung-hwan (20 episodes)

as Kim Jae-joon

as Yoon Tae-woong (16 episodes)

as Shin Myeon (24 episodes)

as Han Seung-Uk (1 episode)

as Lee Min-Woo (123 episodes)

as Park Tae-joon (16 episodes)

as Kang Suk-hoon (20 episodes)

as Se-hoon (21 episodes)

as Kim Young Min (64 episodes)

as Lee Min-woo (18 episodes)